@article{ref1,
title="Statistical materials. Public health services and ambulances",
journal="Zdrowie Publiczne - Polskie Towarzystwo Higjeniczne",
year="1967",
author="Branowitzer, Z.",
volume="4",
number="",
pages="525-530",
abstract="<p>[Abstract unavailable]</p><p>Language: pl</p>",
language="pl",
issn="0044-2011",
doi="",
url="http://dx.doi.org/"
}